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Annotation of prex-old/usr/sample/task/task.c, Revision 1.1

1.1     ! nbrk        1: /*
        !             2:  * Copyright (c) 2005-2006, Kohsuke Ohtani
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution and use in source and binary forms, with or without
        !             6:  * modification, are permitted provided that the following conditions
        !             7:  * are met:
        !             8:  * 1. Redistributions of source code must retain the above copyright
        !             9:  *    notice, this list of conditions and the following disclaimer.
        !            10:  * 2. Redistributions in binary form must reproduce the above copyright
        !            11:  *    notice, this list of conditions and the following disclaimer in the
        !            12:  *    documentation and/or other materials provided with the distribution.
        !            13:  * 3. Neither the name of the author nor the names of any co-contributors
        !            14:  *    may be used to endorse or promote products derived from this software
        !            15:  *    without specific prior written permission.
        !            16:  *
        !            17:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
        !            18:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            19:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            20:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
        !            21:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            22:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            23:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            24:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            25:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            26:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            27:  * SUCH DAMAGE.
        !            28:  */
        !            29:
        !            30: /*
        !            31:  * task.c - a sample program to run tasks.
        !            32:  */
        !            33:
        !            34: #include <prex/prex.h>
        !            35: #include <stdio.h>
        !            36:
        !            37: #define NR_TASKS 10
        !            38:
        !            39: /*
        !            40:  * Create new task
        !            41:  */
        !            42: static task_t
        !            43: task_run(void (*func)(void), char *stack)
        !            44: {
        !            45:        task_t task;
        !            46:        thread_t th;
        !            47:
        !            48:        if (task_create(task_self(), VM_COPY, &task) != 0)
        !            49:                return 0;
        !            50:
        !            51:        if (thread_create(task, &th) != 0)
        !            52:                return 0;
        !            53:
        !            54:        if (thread_load(th, func, stack) != 0)
        !            55:                return 0;
        !            56:
        !            57:        if (thread_resume(th) != 0)
        !            58:                return 0;
        !            59:
        !            60:        return task;
        !            61: }
        !            62:
        !            63: /*
        !            64:  * Function to be called in new task.
        !            65:  */
        !            66: static void
        !            67: hey_yo(void)
        !            68: {
        !            69:        task_t self;
        !            70:
        !            71:        /*
        !            72:         * Display string
        !            73:         */
        !            74:        self = task_self();
        !            75:        printf("Task %x: Hey, Yo!\n", (u_int)self);
        !            76:
        !            77:        /*
        !            78:         * Wait 5 sec
        !            79:         */
        !            80:        timer_sleep(5000, 0);
        !            81:
        !            82:        /*
        !            83:         * Terminate current task.
        !            84:         */
        !            85:        printf("Task %x: Bye!\n", (u_int)self);
        !            86:        task_terminate(task_self());
        !            87: }
        !            88:
        !            89: int
        !            90: main(int argc, char *argv[])
        !            91: {
        !            92:        static char stack[1024];
        !            93:        int i;
        !            94:
        !            95:        printf("Task sample program\n");
        !            96:
        !            97:        /*  Create new tasks */
        !            98:        for (i = 0; i < NR_TASKS; i++) {
        !            99:                if (task_run(hey_yo, stack + 1024) == 0)
        !           100:                        panic("failed to create task");
        !           101:        }
        !           102:
        !           103:        /* Wait here... */
        !           104:        task_suspend(task_self());
        !           105:        return 0;
        !           106: }